[RFA]: Fix jmain.exp to xfail for break at main

[Jeff Johnston]

Michael Elizabeth Chastain wrote:
> jj> Currently, the gdb.java/jmain.exp test has hard-coded line 6 as the
> jj> expected line number for a break at jmain.main (java.lang.String[]).
> jj> This occurs for gcc 3.3 and is incorrect.  Line 6 is the end brace for
> jj> the main routine.  As of gcc 3.4, the line number is reported to be line
> jj> 4.  This also isn't what gdb wants as this points to the open brace.
> jj> The desired result is that we point to line 5 which is the first line in
> jj> main (return statement).  That said, I have changed the expected line to
> jj> be 5 and set the test as an XFAIL.
> 
> Dunno what Andrew will say about this patch but I don't think it's good.
> 

I did talk to Andrew briefly about this.

> XFAIL means 'external fail'.  If you add an XFAIL to the test suite, I
> want to see more analysis about what the bug is -- the best thing is an
> actual gcc PR number.  In the gcc PR is a copy of jmain.java and the
> assembly language output and an explanation of why the assembly language
> output is incorrect.
> 
> What does gcc HEAD do?
> 

It gives line 4.  I meant to imply that above when I said "since 3.4", but I'll 
clarify it here.  For a similar C test case, it points to the return statement. 
  It definitely should not be line 6 in any circumstance.

> If gcc HEAD actually gives line 5, then I would do this in the test
> script:
> 
>   # gcc HEAD 2004-07-05 marks the first line as 5, which is correct.
>   # gcc 3.3.4 -gdwarf-2 marks the first line as line 6.
>   # gcc 3.4.1 -gdwarf-2 marks the first line as line 4.
>   set bpmain "Breakpoint .* file .*jmain.java, line 5\."
> 
> If gcc HEAD gives some other line, then I think you need to file
> a PR against gcc.  It may be low priority and not fixed for years,
> in which case you can XFAIL the test with that PR number.
> 

Ok, I will create the PR and resubmit the patch.

> Michael C
> 
> ===
> 
> 2004-07-07  Jeff Johnston  <jjohnstn@redhat.com>
> 
>          * gdb.java/jmain.exp: Fix expected line number for main to
>          break at.  Set XFAIL for break at main test since gcj does not
>          provide line number info for first statement in main.
>